n. (pl. sheaths)
1. a close-fitting cover, esp. for the blade of a knife or sword.
2 a condom.
3 Bot., Anat., & Zool. an enclosing case or tissue.
4 the protective covering round an electric cable.
5 a woman's close-fitting dress.
Phrases and idioms:
sheath knife a dagger-like knife carried in a sheath.
Derivatives:
sheathless adj.
Etymology: OE sc{aelig}th, sceath